Fix counters not including plugins after sort

Modifying the existing plugins array doesn't fire the update event, so
the counters weren't recalculated.

src/gui/html/js/game.js

@@ -291,8 +291,8 @@
 
   setSortedPlugins(plugins) {
     this.oldLoadOrder = this.plugins;
-    this.plugins = [];
 
+    const newPlugins = [];
     plugins.forEach((plugin) => {
       let existingPlugin = this.oldLoadOrder.find(item => item.name === plugin.name);
       if (existingPlugin) {
@@ -300,8 +300,10 @@
       } else {
         existingPlugin = new Plugin(plugin);
       }
-      this.plugins.push(existingPlugin);
+      newPlugins.push(existingPlugin);
     });
+
+    this.plugins = newPlugins;
   }
 
   applySort() {

src/tests/gui/html/js/test_game.js

@@ -458,11 +458,16 @@ describe('Game', () => {
 
   describe('#setSortedPlugins', () => {
     let game;
+    let handleEvent;
 
     beforeEach(() => {
       game = new loot.Game({}, l10n);
     });
 
+    afterEach(() => {
+      document.removeEventListener('loot-game-plugins-change', handleEvent);
+    });
+
     it('should append new plugins to the plugins array', () => {
       game.setSortedPlugins([{
         name: 'foo',
@@ -520,6 +525,17 @@ describe('Game', () => {
       game.oldLoadOrder[0].name.should.equal('foo');
       game.oldLoadOrder[1].name.should.equal('bar');
     });
+
+    it('should dispatch an event', (done) => {
+      handleEvent = () => {
+        done();
+      };
+      document.addEventListener('loot-game-plugins-change', handleEvent);
+
+      game.setSortedPlugins([{
+        name: 'foo',
+      }]);
+    });
   });
 
   describe('#applySort', () => {